Given a non-empty array of integers, return thekmost frequent elements. Example 1: Input: nums =[1,1,1,2,2,3], k =2 Output:[1,2] Example 2: Input: nums =[1], k =1 Output:[1] Note: You may assumekis always valid, 1 ≤k≤ number of unique elements. Your algorithm's tim...
你可以假设给定的 k 总是合理的,且 1 ≤ k ≤ 数组中不相同的元素的个数。 你的算法的时间复杂度必须优于O(n log n) , n 是数组的大小。 Note: You may assume k is always valid, 1 ≤ k≤ number of unique elements. Your algorithm's time complexity must be better than O(n log n), ...
Given a non-empty array of integers, return thekmost frequent elements. For example, Given[1,1,1,2,2,3]and k = 2, return[1,2]. 其实最简单的就是想到就是用一个小顶堆实现,如果堆中元素个数小于K,则插入元素,如果大于K,则和堆顶比较,如果大于堆顶,则弹出堆顶,插入新元素。 自己实现红黑树...
func topKFrequent(nums []int, k int) []int { // 统计 nums 中每个数字出现的次数, // 时间复杂度为 O(n) ,空间复杂度为 O(n) numToCnt := make(map[int]int) for _, num := range nums { // num 如果不在 num_to_cnt 中,则初始化为 0 , // 然后对 num 的出现次数加 1 numToCn...
【LeetCode】347. Top K Frequent Elements Given a non-empty array of integers, return the k most frequent elements. Example 1: Input: nums = [1,1,1,2,2,3], k = 2 Output: [1,2] Example 2: Input: nums = [1], k = 1 Output: [1] No......
FindHeaderBarSize FindTabBarSize FindBorderBarSize Given an integer arraynumsand an integerk, returnthekmost frequent elements. You may return the answer inany order. Example 1: Input:nums = [1,1,1,2,2,3], k = 2Output:[1,2]
Leetcode: 347. Top K Frequent Elements Question: Given a non-empty array of integers, return the k most frequent elements. Example 1: Input: nums = [1,1,1,2,2,3], k = 2 Output: [1,2] Solution 1: Priority Queue Time Complexity: Time complex......
https://leetcode.com/problems/top-k-frequent-elements/ Given a non-empty array of integers, return the k most frequent elements. For example, Given [1,1,1,2,2,3] and k = 2, return [1,2]. Note: You may assume k is always valid, 1 ≤ k ≤ number of unique elements. ...
Leetcode 347. Top K Frequent Elements 0 / 0 / 创建于 5年前 / 之前写的一个很随意的遍历 k 次取最大值,时间复杂度 kn先排序再取的复杂度 nlogn 用最大堆平均复杂度是 nlogkkn>>nlogn>nlogk最大堆 (目前已知最优解)复盘:顺便用 LeetCode 这题的 Testcase 测出了之前写的最大堆 shiftDown 的...
[leetcode] 347. Top K Frequent Elements Description Given a non-empty array of integers, return the k most frequent elements. Example 1: Input: AI检测代码解析 nums = [1,1,1,2,2,3], k = 2 1. Output: AI检测代码解析 [1,2]